ACI 530 6.2.2.3.1.3
ACI 530 6.2.2.3.1.3
(OP)
I have a building that I am currently designing that is 3 story 40’-0” high (37’-6” high with a 2’-6” parapet) that has a brick façade. Openings in the brick (for windows and doors) are limited to 8’-0” in width (ie no “strip windows). The building is being constructed following the IBC2009 requirements. In accordance with the masonry code (ACI 530), we are planning on supporting the brick at the third floor elevation of 26’-0” +/- (this keeps it under the 30’ requirement).
ACI 530 also requires the weight of the veneer to be supported at each story above this 26’-0” height. In this instance would the weight of the brick need to be supported at the roof? In accordance with the code this appears to be true, but we are only supporting 3’-4’ of veneer max and it just seems like a waste.
ACI 530 also requires the weight of the veneer to be supported at each story above this 26’-0” height. In this instance would the weight of the brick need to be supported at the roof? In accordance with the code this appears to be true, but we are only supporting 3’-4’ of veneer max and it just seems like a waste.






RE: ACI 530 6.2.2.3.1.3
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: ACI 530 6.2.2.3.1.3
That is not how the section reads:
If anchored veneer with a backing of cold-formed steel framing exceeds the height above the noncombustible foundation given in table 6.2.2.3.1 (which says 30'), the weight of the veneer shall be supported by noncombustible construction for each story above the height limit given in table 6.2.2.3.1
Seems pretty specific, but we are talking about 16' of supported veneer on the third floor steel framing. I don't think this is unreasonable.
Out of the gate I have been told that this project has budget problems. I told the client to limit the height of the brick to 30' and use a different cladding material above and so far they have refused.
RE: ACI 530 6.2.2.3.1.3
Another issue is whether or not a parapet constitures a storey. I would argue that it does not.
There seems to be a fire protection angle to this that I do not fully understand. Do you understand it? Perhaps, with the fire protection intent in hand, the answer would be easier to parse out.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: ACI 530 6.2.2.3.1.3
12.2.2.3.1.3 - If anchored veneer with a backing of cold-formed steel framing exceeds 30 feet, or 38 feet at a gable, in height above the location where veneer is supported, the weight of veneer shall be supported by noncombustible construction at each story above 30 feet in height.
RE: ACI 530 6.2.2.3.1.3
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: ACI 530 6.2.2.3.1.3
I am just trying to make sure I am doing this right and I definitely appreciate your opinion. My impression is that the height limit is based more upon expansion/contraction of the veneer and the joints used to accommodate this movement of the brick and not a fire issue. The commentary in ACI 530 references "industry practice" and the model building code for this limit.
I did a search online and oddly enough I found a reference that shows how/where to support the brick. It also does not show a support at the roof which is pretty much the question I am asking.
http://www.masonrysystems.org/knowledge/basics/ven...
RE: ACI 530 6.2.2.3.1.3
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.